Removed a type that I wasn't using

nfa.go

@@ -205,11 +205,6 @@ func (s State) matchesFor(str []rune, idx int) ([]*State, int) {
 	return listTransitions, numTransitions
 }
 
-type NFA struct {
-	start   State
-	outputs []State
-}
-
 // verifyLastStatesHelper performs the depth-first recursion needed for verifyLastStates
 func verifyLastStatesHelper(state *State, visited map[*State]bool) {
 	if len(state.transitions) == 0 {